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This is to unlock the keypad ..press the central pad then press * to unlock the keypad.According to Nokia support the method used to activate a Nokia keypad unlock and lock mechanism while in stand-by mode is first to press the center scroll key, known as the 'navi key' followed by pushing the star key. This will either secure the keypad or render it usable depending on the previous state it was in.It is also possible to have it so after a certain period of time the keypad will automatically lock. To deactivate this feature follow the steps below:

1. First press the menu key2. Select the option 'settings'3. You will then need to select one of either Phone, Phone Settings or Device depending on the Nokia device owned.4. Choose Automatic Keyguard and select 'OFF'If you still need my help, please provide more details about your Nokia problem (nokia model #, how the problem started, etc..)

You can get the correct Unfreeze Code and Instructions at herehttp://www.superunlockcodes.com/samsung-jet/rs12wp9/ and Unfreeze Samsung Jet..........
Samsung Jet Unlocking InstructionsWarning :
Do not enter any wrong unlock codes on your Samsung Jet mobile phones.
If you enter over a certain amount of wrong unlock codes on your Samsung
Jet mobile phone, your phone may get hard locked and sometimes become
unusable.Method 1:

Keypad lockTo prevent accidental key presses,
select Menu,
and press * within 3.5 seconds to lockthe keypad.To unlock the keypad, select Unlock, and press * within 1.5 seconds. Ifthe security keyguard is on, enter the
security code when requested.To set the keypad to lock
automatically after a preset time when thephone is in the standby mode, select Menu >
Settings > Phone >Automatic
keyguard > On.To answer a call when the keypad is
locked, press the call key. When you end or rejectthe call, the keypad locks
automatically.When the device or keypad is locked,
calls may be possible to the official emergencynumber programmed into your device.

The Keypad Lock Icon is seen on top of the screen at various positions depending on the number of icons displayed. An Open Lock signifies that the phone’s keypad is unlocked and a closed lock signifies that the keypad is locked. You can unlock the keypad by pressing Unlock (by right soft key) on the phone, followed by the Send (GREEN) key. Similarly for locking the keypad, press the End (RED) key, to be followed by the Send key.

The user guide for your phone does not indicate a default pass code. Most default passcodes are either 5 or 6 zeros. Some are 12345.

You
can manually lock the keypad to avoid pressing keys by accident. You
can still answer an incoming call and the keypad will lock again when
the call is finished. The keypad remains locked until you unlock it
manually. Depending on your phone model, you can activate the
automatic keylock. When the automatic keylock is activated, the keypad
locks shortly after you stop pressing keys. Please note: with
some phones you can still use external keys when the keypad is locked.
If you wish to lock the external keys you must lock them separately.

You can manually lock the keypad to avoid pressing keys by accident. You can still answer an incoming call and the keypad will lock again when the call is finished. The keypad remains locked until you unlock it manually.
Depending on your phone model, you can activate the automatic keylock. When the automatic keylock is activated, the keypad locks shortly after you stop pressing keys.
Please note: with some phones you can still use external keys when the keypad is locked. If you wish to lock the external keys you must lock them separately.

first, take out the battery and press the RED end call key for 15 seconds, then put the battery back in and turn on the phone.

if that doesn't work then try this from the website.

"
How do I lock/unlock the phone's keypad?
To lock and unlock your phone's keypad, press and hold the left navigation key.
Or, select Menu -> Settings -> Keyguard. Then highlight either of the options and press the OK
button. You can set your phone to lock the keypad immediately, or
automatically if no key is pressed after 30 seconds, 1 minute, or 5
minutes.